There is a teacher from Texas that loves hairless guinea pigs. In guinea pigs, the dominant allele H codes for the trait of having hair and the allele h codes for the trait of being hairless. (Assume Mendelian inheritance). Let’s say that this teacher receives her wish of finding a hairless guinea pig at a pet store and names her Genevieve. She finds another guinea pig at a store with hair that she names Fred.
While she can be certain of Genevieve’s genotype, how could she determine what
genotype Fred is? She can do a test cross! A test cross involves breeding an organism with a dominant trait (like Fred) with an organism that exhibits a recessive trait (like Genevieve).
9. Genevieve has the genotype ___________.
10. Fred’s genotype could be ________ or _________.
11. If Fred was genotype __________ and bred with Genevieve...
12. Please draw Punnett Square below to show prediction for offspring.
13. If Fred was genotype __________ and bred with Genevieve...
14. Please draw Punnett Square below to show prediction for offspring.
15. Explain in your own words how the offspring from the test cross could help determine Fred’s genotype.
16. What could be some weaknesses with using a test cross to determine Fred’s genotype?
Answers
Answer:
one allele from mother, one allele from father
yes, this means the mother's alleles are dominant
Explanation:
"The amount of alleles that a baby Guinea pig inherit from the mother are two , 1 from its mother and 1 from its father.
ie: if its mother had a dominant black fur (BB) and its father has recessive grey fur (bb) , there is 100% chance that the baby will has a Bb genotype, which will give them either black fur or dark grey fur."
Yes, the mother likely has several dominant alleles that manifested as a heterozygous genotype in the baby, giving it a phenotype largely similar to its mother.
Answer:
9. hh
10. Hh or HH
11. Hh
12. 1rst imagen down below
13. HH
14. Second Image down below
15. testcross is used to determine the genotype of a person while crossing it with a heterozygous dominant person.
16. If all the offspring have the dominant character it means that both the l of the parents are similar however if the allele a different then one of the offspring will become of the recessive character
Explanation:
